Definitely has not been fully fixed for Switch. Not a connection or configuration issue since realms works fine on my kid's Switch. Already deleted and redownloaded the software.
We apologize for the inconvenience, but this is currently a known issue.
The team is currently working on a fix that we hope to have out to everyone as soon as possible.
Thank you for your patience while we work on the solution!
The problem you've described sounds like a temporary issue and should have been resolved now. Please try again, and reply to this email if you're still having the same problem. ^RL